22274 - Top Rare NWA 10023 Anomalous Plessitic Pallasite Meteorite PMG-an 1.128 g
22274 - Top Rare NWA 10023 Anomalous Plessitic Pallasite Meteorite PMG-an 1.128 g 22274 - Top Rare NWA 10023 Anomalous Plessitic Pallasite Meteorite PMG-an 1.128 g 22274 - Top Rare NWA 10023 Anomalous Plessitic Pallasite Meteorite PMG-an 1.128 g

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22274 - Top Rare NWA 10023 Anomalous Plessitic Pallasite Meteorite PMG-an 1.128 g

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NWA 10023 Pallasite PMG-an - Meteorite
Fell in the Moroccan/Algerian border
Pallasite PMG-an
13.9 mm   •    in
1.128 g   •    oz
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Beautiful example of 1.128 g of this rare Pallasite found on the border between Algeria and Morocco. This type of Pallasites in the Northwest of Africa are very rare and the NWA 10023 is one of the few officially classified. Is the ONLY PLESSITIC PALLASITE.

The authenticity of this specimen is guaranteed by the geologist Juan Avilés Poblador, member of International Meteorite Collectors Association (IMCA 5681).

Meteoritical Bulletin Database

Northwest Africa 10023

Basic information Name: Northwest Africa 10023
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10023 
Observed fall: No
Year found: 2014
Country: (Northwest Africa) 
Mass:help 6.95 kg
Meteoritical Bulletin:   MB 104   (2015)   Pallasite, PMG-an
Recommended:   Pallasite, PMG-an    [explanation]

This is 1 of 15 approved meteorites classified as Pallasite, PMG-an.   [show all]
Search for other: Main group pallasites, Metal-rich meteorites, and Pallasites
Comments: Approved 16 Mar 2015
Writeup from MB 104: 

Northwest Africa 10023 (NWA 10023)

(Northwest Africa)

Purchased: 2014

Classification: Pallasite (Main group, anomalous)

History: Purchased from Rachid Chaoui in December 2014, reportedly found near the Moroccan/Algerian border.

Physical characteristics: One piece. Polished saw cuts show angular, orange-brown-green, translucent olivine; some grains up to ~2 cm in size. Metal makes up approximately 30-40% of this meteorite. There is only minor oxidation present.

Petrography: (C. Agee, UNM) The etched surface of this pallasite shows approximately 98% of the metal consisting of very fine-grained (<1 μm) plessite, whereas kamacite occurs only as a thin mantling around olivine crystals. Olivine is the only silicate phase present. Accessory schreibersite, chromite, Ni-rich sulfide, and Ca-Mg phosphates were observed.

Geochemistry: (C. Agee and N. Muttik, UNM) Olivine Fa12.7±0.6, Fe/Mn=47±3, n=8; plessite Fe=84.0±1.2, Ni=15.4±0.7, Co=0.55±0.08 (all wt%), n=4; kamacite Fe=93.1±3.0, Ni=5.9±0.2, Co=0.88±0.13 (all wt%), n=4; schreibersite Fe=58.8±5.1, Ni=27.9±2.1, Co=0.22±0.00, P=14.8±0.08 (all wt%), n=2; Fe-Ni sulfide Fe=49.9, Ni=16.1, Co=0.24, S=33.9 (all wt%), n=1. Likely farringtonite Mg3(PO4)2 and stanfieldite Ca3Mg3(PO4)4 detected in EDS. Oxygen isotopes (K. Ziegler, UNM): 7 acid-washed fragments analyzed by laser fluorination gave, respectively δ18O= 3.667, 3.554, 3.167, 3.143,3.608, 3.887, 3.368; δ17O= 1.693, 1.630, 1.440, 1.458, 1.668, 1.753, 1.572; Δ17O= -0.243, -0.247, -0.232, -0.202, -0.237, -0.299, -0.206 (linearized, all per mil), mean value δ18O=3.485±0.273, δ17O=1.602±0.118, Δ17O=-0.238±.032 (TFL slope=0.528).

Classification: Pallasite, PMG-an. An unusually high amount of the metal is in the form of plessite. Oxygen isotopes indicate an affinity to the pallasite main group.

Specimens: 20.3 g including a probe mount on deposit at UNM, DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase: Morocco
Date: P 2014
Mass (g): 6950
Pieces: 1
Class: Pallasite, PMG-an
Shock stage: low
Weathering grade: low
Fayalite (mol%): 12.7±0.6
Classifier: C. Agee, UNM
Type spec mass (g): 20.3
Type spec location: UNM
Main mass: Darryl Pitt
Comments: Submitted by C. Agee
This is a unique item. A physical certificate of authenticity will be provided. The certificate, elaborated individually by an expert paleontologist, contains an accurate scientific description and the certificate validity can be verified online at all times. In addition, a 100% money back guarantee is provided. Learn more.


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